III.R28 — Export Contracts: Books IV-VII

Binding precondition/postcondition contracts for each downstream book. Book IV: fiber T² at E₁, D-sector, particle spectrum + gravity. Book V: base τ¹ at E₁, A/B/C sectors, gauge forces + cosmology. Book VI: E₂, proto-codes, origin of life. Book VII: E₃, self-models, ethics, saturation.